Furnace-wall construction



Dec; 10,1929. l... H. HossEIN FURNACE WALL CONSTRUCTION Filed Oct. 1.1924 Patented Dec. 10, 1929 UNITED STATES PATENT OFFICE LOUIS H.HOSIBEIN, OF WINNETKA, ILLINOIS, ASSIGNOR TO M. H. DETRIGK COMPANY OFCHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS FURNACE-WALL CONSTRUCTIONApplication filed October 1, 1924. Serial No. 741,053.

This invention relates to the construction of heat resisting walls,particularly walls designed to sustain very high temperatures, such asmay be encountered in various furnaces.

In many types of furnace construction the present tendency is toward theuse of combustion chambers of greatly increased size,

which is a factor contributing to efliciency,

particularly in instances where provision is' In some of the moreadvanced designs of such structures, provision has been made for thesupport or suspension of the refractory wall in sections or units whichare associated to form a tight closure, yet retain a certain freedom ofrelative mobility such as to accommodate expansion and contraction inthe structure. In certain recent designs moreover, provision is made forthe independent support of the component units or sections in suchrelationship that the refractories are relieved of the necessity ofcarrying excessive weight. Such construction has renderedfeasible thebuilding of refractory walls of increased height and length, and thepresent improvements have been devised with the particular object oftaking care of the increased lineal expansion in such structures, whilemaintaining the integrity of the refractory closure.

One of the particular objects attained by the present invention is theprovision of construction whereby tight joints may be maintained at thecorners or other junctions of the refractory walls, and wherein thetendency of meeting walls to cause distortion or disalignment incident.to expansion, is greatly decreased.

Another object is the provision of construction which will involve theuse of minimum material and permit duplication of parts to a mostextensive degree.

Another object is the provision of struc ture which is convenientlyapplicable in walls of the suspended type above mentioned.

Other and further objects of the invention will be pointed outhereinafter, indicated in the appended claims, or obvious to one skilledin the art upon an understanding of the present disclosure.

.For the purpose of this application I have elected to present hereincertain embodiments of the invention, but it is to be understood thatthy are offered for the purpose of illustration merely, and are not tobe regarded as limiting the invention which I purport to secure, shortof its true and most comprehensive scope in the art.

In the drawing forming part of this specification,

Fig. 1 is a detail in the nature of a sectional elevation takenlongitudinally of a portion of a furnace wall, as on the section lines1-1 of Fig. 3.

Fig. 2 is another detail in the nature of a sectional elevationtransversely through a portion of the furnace wall, as taken on lines2-2 of Figs. 1 and 3;

Fig. 3 is a cross section of a portion of a furnace wall on a linecorresponding to line 33 of Fig. 1.

Fi 4 is an illustration in perspective, of one orm of cover brickretainer. Fig. 5 is. a fragmentary detail in the nature of across-section of a wall portion including' another form of cover brickretainer, and

Fig. 6 is a fragmentary sectional elevation of the same.

The present invention is in the nature of improvement in certainfeatures of the furnace wall construction described and claimed in theco-pending applications of Raymond D. Foltz, Serial Nos. 684,698 and711,557, the

general wall structure herein shown being of the type therein disclosed.Hence, it will be understood that in the accompanying drawing themembers designated by the reference characters 10 are structural membersforming supports for the furnace wall or portions in horizontally rumnngseries with the series the respective refractories arranged one aboveanother. The hangers have shelf portions 12 upon each of which iscarried a stack or tier of refractories 14L in the form of slot-ted tilewhich are retainedin position on the hanger by engagement with theretaining flanges 12 of the latter. The

hangers have the horizontal flanges 12' which support partition brick 15arranged to extend between the sheathing wall 11 and the outer ends ofthe refractories 14, to subdivide the intervening space intocompartments, and also the outer flanges 12, spaced from the outer facesof the refractories 14. Throughout the greater portion of the length ofthe wall the hangers 12 are disposed so that juxtaposed tiers of tileare in lateral abutment, so as to form a tight wall, this being thecasealso at the corners or wall intersections. At suitable intervals,however, a proper space is left between the refractories on adjacenthangers to accommodate the expansion of the portions or sections-of thewall as thus subdivided, said spaces beingvdesignated by the referencecharacter S. Inasmuch as ordinarily there is a number of horizontalseries of hangers, it will be understood that in such instances therewill be a number of these expansion spaces distributed along the heightas well as the length of the wall. Vertical expansion in the structureis accommodatedby horizontal expansion joints as explained in theapplications mentioned above. Consequently, it will be observed, thewall may be regarded as built up of a plurality of sections which areseparated by expansion spaces, with each section comprising a number ofindependently flexibly suspended units, with in each unit susceptible ofa certain amount of movement relative to the others. Due to thismobility of the individual refractories and the respective units,expansion in the plane of the wall will be accommodated by the expansionspaces so readily as to relieve the refractories and the supportingmembers of destructive stresses. In conjunction with the features forholding the individual refractories and composite units in alignment,the opportunity for expansion thus afforded will be effective tomaintain the structure against warping andbulging. The expansion spacesperform another important function in the structure in regularities inthe size of the tile.

for ir- While maintained within certain tolerances, it will beunderstood that it is commerically impracticable to make all of the tileof exactly the same width. Consequently, after a number of that theyaccommodate or compensate tiers have been placed together with theirsides in abutment, itmay be found that some of the tile in the last tierwill project laterally beyond others. It will be understood, of course,that the fit of the tile on the hanger flanges 12 allows sufficientclearance for the tile to adjust themselves to this condition. However,with assembly of a great number of tiers, the aggregate of thesediscrepancies in nary conditions this would result in a leaky wall. Iprevent such a contingency by the provision of external closures for theexpansion-joints. I These closures are formed by the cover bricks 16which may be refractories of the kind ordinarily known as split brick,and they are stood end on end against the outer surfaces of therefractories 14 and covering the expansion space. They are held in placeby suitable retaining members, designated 17 in Figs. 1, 2 and 3 and 17'in Figs. 5 and 6. One of the retaining members is illustrated in Fig. 4,wherein it will be seen that it is provided with lateral wings 17 aconjoined by an offset body strip 17 the recess formed the latter beingsubdivided vertically by the flange 17 The flange 17 .is interposedbetween the ends of the cover bricks so that the portion 17 b overlapstheir outer sides, and the end portions 17" are interposed between theouter ends of the refractories 14 and the outer flanges 12 of thehangers. By this assembly the cover bricks are held in contact with thewall refractories so as to form a tight closure for the expansionspaces. Ordinarily the lowermost cover brick rests upon the partitionbricks 15. In the absence of the partition bricks, however, the coverbrick may be maintained by the hangers of the subjacent series. Theretaining members 17 are held by their flanges 17 0 against slidingdownward, and their movement laterally is limited by the webs of thehangers 1 2, so that they prevent displacement of the bricks 16 fromover the expansion spaces.

' In the form illustrated in Figs. 5 and 6,

the retaining members 17 are straight and also limits lateral movementby contacting the hangers.

By virtue of the constructions described, the flexibility of the wall isincreased and accommodation for expansion is afforded in such fashionthat allowance does not have to be made at the ends of the wall for thecumulative expansion of the material in its entire length. Consequentlythere is not the oppor tunity for adjoining walls to force one anotherout of alignment and the corners may be kept tight without the use ofpacking. The expansion joint closures accommodate the movement oftheWall refractories and, unlike packing in vertical joints, are notdisplaced by enlargement or-contraction of the expansion spaces. Theclosure is permanent and is easily assembled and does not interfere inany fashion with the assembly of the wall structure as a whole or withits dismantling in part for the purpose of repair.

What I claim is:

1. In furnace wall construction, the combination with movably supportedwall sec tions arranged with expansion spaces between certain sections,of refractory closures supported free of the sections and externallycontacting the wall and closing the expans1on spaces.

2. In furnace wall structure, refractories movably supported to formwall sections with expansion spaces therebetween, and

' closures spanning the expansion spaces.at

the outer side of the wall and supported in sliding contactwith externalsurfaces ofthe' refractories on opposite sides of the expansion spaces.

3. In furnace construction, in combination, wall hangers, refractoriessup orted thereon to constitute wall sections, sald sections arrangedwith intervening expansion spaces, and closures sustained by the hangersat the outer side of the wall in covering relationship to the expansionspaces.

4. In furnace construction, refractories arranged in juxtaposed tierswith expansion spaces therebetween, closure members covering theexpansion spaces at the outer sides of the refractories, andhangers'maintaming the refractories and closure members in contact.

5. In furnace construction, the combination of refractories arranged injuxtaposed courses with intervening expansion spaces, cover brickclosing said expansion spaces at the outer side of the refractories, andretaining members holding the refractories and cover brick in assembly.

6. In furnace construction, the combinetion of refractories arranged incourses with lntervemng expanslon spaces, cover brick 7. In furnaceconstruction, refractories supported in relatively movable groups toform wall portions meeting at'a corner, certain of the groups beingspaced apart to provide expansion spaces, and closures supported insliding contact with the refractories and covering the expansion spacesexternally.

8. In furnace wall construction, in combination, refractories supportedin juxtaposed tiers, cover brick arranged against the outer faces of therefractories in overlapping relationship to those in separate tiers, andretainin means holding the refractories against inward displacement andthe cover brick in contact with them.

9. In furnace wall construction, combination of refractories arranged injuxtaposed tlers with intervening expansion spaces, means holding therefractories in approximate alignment, cover brick closing the expanslonspaces, and retaining members engaged with said means for holding thecover brick against the refractories.

10. In furnace wall construction, in com:- bination, shiftable tileretainin members, refractories retained thereby to orm wall sectionswith intervening expansion space, an external closure for the expansionspace, and retaining means retained by the tile retaining members for;holding the closure in position.

11. In furnace wall structure, in combination, rigid members,refractories movably retained thereon to form wall sections, cover brickoverlapping the outer faces of refractories in dlflerent sections andretaining hold the cover bricks in position, said cover bricks andrefractories being relatively movable to limited degree.

12. In furnace wall structure, combination of rigid members,refractories movably supported thereon to form vertical wall sectionswith intervening expansion space, and cover brick maintained by therigid members in position to close to cover the outer opening of theexpansion space, said brickand refractories being relatively movable invertical planes.

13. In furnace wall structure, in combination, parallel hangers,refractories retained thereby to form wall sections, cover brickcovering the joint between said wall. sections, and retaming membersenga ed with the hangers for holding the cover rick against therefractories.

In testimony whereof I have hereuntQsiibscribed my name. i

covering the expansion spaces, and retaining;

members holding the refractories in approximate alignment and the coverbrick in contact with their outer faces.

CERTIFICATE OF CORRECTION.

Patent No. 1,738,707: Granted December 10', 1929, to.

LOUIS H. HOSBEIN.

It is hereby certified that error appears in theprinted specification ofthe above numbered patent requiring correction as follows: Page 3, line111, claim l2, strike out the words .to close"; and that the saidLetters Patent should be read with this correction therein that the samemay conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of January, A. D. 1930.

M. J. Moore;

(Seal) Acting Commissioner of Patents. 7

